A 150 L Buffer Solution Is 0

Multiple Choice

A 1.50 L buffer solution is 0.250 mol L^-1 in HF and 0.250 mol L^-1 in NaF. Calculate the pH of the solution after the addition of 0.0500 moles of solid NaOH. Assume no volume change upon the addition of the base. The K_a for HF is 3.5 × 10^-4.

A) 3.34
B) 3.46
C) 3.57
D) 3.63
E) 2.89